What are the signs of choline deficiency?

Choline deficiency can cause muscle damage, liver damage and non-alcoholic fatty liver disease.

Who is most likely to run low

Roughly 90–95% of pregnant women consume less choline than the Adequate Intake.

What this means for you

Choline is the nutrient most people have never checked, and the intake numbers look alarming until you read them properly. Average intake in the United States is 402 mg a day in men and 278 mg in women, against Adequate Intakes of 550 and 425. Most people fall below the target. Almost nobody develops the deficiency disease.

That gap is real and worth explaining. The Adequate Intake was set from small feeding studies rather than from population outcomes, and the body makes some choline in the liver on its own, though not enough to cover the need entirely. So a number below the target is a reason to eat more eggs, not a diagnosis.

Established. When deficiency does occur, it lands on the liver and muscle. Muscle damage, liver damage and non-alcoholic fatty liver disease are the documented consequences. It has been produced deliberately in feeding studies and it shows up in people on long-term intravenous nutrition.

The group that matters most

Roughly 90 to 95 per cent of pregnant women take in less choline than the Adequate Intake, and pregnancy is when the requirement rises, because choline is used heavily in building the fetal brain. Many prenatal supplements contain little or none of it, which is worth checking on the label rather than assuming.

The food answer is simple and cheap. Two eggs carry roughly 300 mg between them, most of it in the yolks. Beef liver is denser still. Chicken, fish, soybeans, cruciferous vegetables and beans all contribute.

On the heart worry that circulates about choline and TMAO, several large observational studies have found no significant association between choline intake and cardiovascular or peripheral artery disease.

Why deficiency is an awkward word here

Your body makes some of its own choline, through an enzyme called PEMT that oestrogen turns up. That is the stated reason the American recommendation asks men for 550 mg a day and women for 425, and it means two people eating identically can be in different positions. Common variations in the PEMT gene shift it again. So a low intake predicts trouble less reliably here than it would for a vitamin the body cannot make at all.

The recommendation is a softer number than it looks. Europe publishes one figure, 400 mg a day for every adult and for teenagers from 15, where the United States publishes two by sex. Both are Adequate Intakes, which is the label a body uses when it could not work out a requirement.

Where the shortfall is real

Established. In pregnancy the gap is close to universal. Pooling a dozen studies, about 11 per cent of pregnant women reached the recommended choline intake, which leaves nearly nine in ten below it. In the same pooled data, higher maternal choline went with a lower risk of adverse pregnancy outcomes, an odds ratio of 0.51. That part is observational and cannot tell you that supplementing fixes anything. It is still the clearest signal choline has.

The other group is anyone eating little or no animal food. Choline is concentrated in liver, eggs and wheat germ, and in most countries meat, dairy, eggs and grain deliver the bulk of it. A plant-based pattern generally carries less, and among women of childbearing age a vegetarian-leaning diet went with a lower intake.

What supplementing has actually done

Unsettled. The strongest randomised result is narrow. In children of pregnancies heavily exposed to alcohol, choline given before birth improved memory with a moderate effect size on moderate-certainty evidence, and given after birth it may improve global cognition on weaker evidence. That is a specific injured group under clinical care. In very preterm babies, added choline lifted blood choline from about 18 to 35 micromoles per litre, close to what a fetus would have had. In healthy older adults the one memory trial moved verbal memory up and processing speed down at the same visits, which is a reason to wait for another trial rather than to buy anything.

Myth. Europe specifically refused the claim that choline is needed for the development of the brain of infants and young children from birth to three years. It also refused the memory claims for lecithin and for citicoline. Hold that carefully. A refusal records that the evidence did not meet the bar at assessment, and it is not a ruling that choline is irrelevant to a developing brain. What it does mean is that anybody printing that promise on a package in Europe is outside the rules. This is the European register. FDA is a separate question with a separate answer.

One thing choline has been tested for at scale and failed. Citicoline, a choline compound given after an ischaemic stroke, was pooled across ten trials in more than 4,000 people. Deaths came out at 17.3 per cent against 18.5 on placebo, disability at 21.7 against 19.2 per cent, and serious cardiovascular events did not differ. A shortfall in the diet is worth taking seriously. Choline as a treatment is a different claim, and that one has an answer.

Written from the evidence cards and the data on this page, then checked back against the sources. Bioma Learn has no human medical reviewer at this time and we say so rather than invent one. Information, not medical advice. How we verify.

Where to get it from food

• Egg, whole, cooked, hard-boiled — 399.6 mg per 1 cup, chopped (73% DV)
• Chicken, liver, all classes, cooked — 246.5 mg per 3 oz (45% DV)
• Eggs, whole — 168.5 mg per 1.0 egg whole without shell (31% DV)
• Chicken, giblets, cooked, simmered — 151.4 mg per 3 oz (28% DV)
• Chicken, gizzard, all classes, cooked — 151.4 mg per 1 cup chopped or dice (28% DV)

All choline sources ranked →

Full guide: Choline: the nutrient almost nobody meets, and almost nobody discusses